# Civil Engineering - Surveying - Discussion

Discussion Forum : Surveying - Section 1 (Q.No. 2)

2.

If

*h*is the difference in level between end points separated by*l*, then the slope correction is . The second term may be neglected if the value of*h*in a 20 m distance is less thanDiscussion:

67 comments Page 7 of 7.
Ramu said:
10 years ago

Answer is 1

From answer verification, If we substitute 1/2 in second term then it will negligible compared to other.

From answer verification, If we substitute 1/2 in second term then it will negligible compared to other.

Rashmi said:
10 years ago

How 3.30?

Nanda said:
10 years ago

@Vijay patel.

h2 = 2*20

h square = 40.

How come h = 3.3?

h2 = 2*20

h square = 40.

How come h = 3.3?

VIVEK CHANDEL said:
1 decade ago

For slopes of 10 percent or less, the correction to be applied to L for a difference d in elevation between tape ends, or for a horizontal offset d between tape ends, may be computed from,

Cs=(h^2)/(2L).

For a slope greater than 10 percent, Cs may be determined from,

Cs={(h^2)/(2L)}+{(h^4)/8(L^3)}.

Cs=(h^2)/(2L).

For a slope greater than 10 percent, Cs may be determined from,

Cs={(h^2)/(2L)}+{(h^4)/8(L^3)}.

Aman said:
1 decade ago

If we use any value lesser than 3 and not greater than 3, then answer for slope correction either using the complete formula given above or by eliminating the second term, we will get the same answer. Thus it means that the second term can be eliminated the right answer is 3 and distance kept as 20m.

NamrathaSai said:
1 decade ago

Would you please explain the calculations! Why are you taken that h2/2l=1?

Vijay patel said:
1 decade ago

Second term neglect and l = 20.

So h2 = 2L.

h2 = 2*20.

h = 3.3m.

Near equal to 3m.

So h2 = 2L.

h2 = 2*20.

h = 3.3m.

Near equal to 3m.

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